Setting Options

Options contains user configurable settings.
The full Options Setting page is here: Options Setting [753] ../Images/opencpn_manual_settings.png
OpenCPN uses some basic settings or limitations.

Courses are by default true, not magnetic. Change this in Options → Display → Units.
All distances and routes are calculated using Mercator Sailing. Great Circle Sailing is an option in route creating.
For Windows: only one instance of OpenCPN is allowed. Use the portable option if more instances are needed.
Do not edit the opencpn.ini (opencpn.conf) file when OpenCPN is running.